FLUX 1.1 Pro | AI Playground
Create detailed, prompt-faithful images with superior composition and artistic fidelity, generating significantly faster while supporting typography, branding, portraits, and playful illustration styles.
Table of contents
1. Get started
Use RunComfy's API to run blackforestlabs/flux-1-1-pro/text-to-image. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-1-1-pro/text-to-image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A cocktail menu book placed on a bar counter. The cover design is minimalist with the 'Zeitinsel' logo prominently centered on the front. Below the logo is an elegant photograph of an Aviation cocktail in a crystal coupe glass, showcasing its signature lavender-blue hue with a maraschino cherry floating delicately on top. The lighting captures the subtle purple tones while the liquid appears silky smooth, creating an ethereal and sophisticated appearance. The cover maintains a clean and elegant aesthetic."
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-1-1-pro/text-to-image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A cocktail menu book placed on a bar counter. The cover design is minimalist with the 'Zeitinsel' logo prominently centered on the front. Below the logo is an elegant photograph of an Aviation cocktail in a crystal coupe glass, showcasing its signature lavender-blue hue with a maraschino cherry floating delicately on top. The lighting captures the subtle purple tones while the liquid appears silky smooth, creating an ethereal and sophisticated appearance. The cover maintains a clean and elegant aesthetic."
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "",
"type": "string",
"default": "A cocktail menu book placed on a bar counter. The cover design is minimalist with the 'Zeitinsel' logo prominently centered on the front. Below the logo is an elegant photograph of an Aviation cocktail in a crystal coupe glass, showcasing its signature lavender-blue hue with a maraschino cherry floating delicately on top. The lighting captures the subtle purple tones while the liquid appears silky smooth, creating an ethereal and sophisticated appearance. The cover maintains a clean and elegant aesthetic."
},
"image_size": {
"title": "Aspect Ratio (W:H)",
"description": "When selecting a custom range, it must be a multiple of 32. If it's not, it will be automatically rounded to the nearest multiple of 32.",
"type": "string",
"enum": [
"16:9",
"4:3",
"1:1",
"1:1 (hd)",
"3:4",
"9:16",
"Custom"
],
"default": "16:9"
},
"seed": {
"title": "Seed",
"description": "",
"type": "integer",
"default": 81048285
},
"raw": {
"title": "Raw Mode",
"description": "Enabling raw mode means generating images that are less processed and more natural-looking.",
"type": "boolean",
"default": false
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.